Developer Alan Ojeda’s 1450 Brickell office tower tops off today, as forecasts predict Miami Class A vacancy rates around 15 percent for 2009. But Ojeda isn’t worried about the market for his 586,000-square-foot, $140 million tower. He said the tower’s location and the quality of the construction will help it stand out in the marketplace. The tower is surrounded by more than 30,000 square feet of retail space and about 30 retail businesses. The building, slated for delivery in January 2010, will be Miami’s first LEED Gold-certified office tower.